萃取法预处理间二硝基苯生产废水

Treatment of wastewater for meta-dinitrobenzene production by extraction

间二硝基苯生产废水中含有邻硝基苯磺酸和对硝基苯横酸 ,采用三辛胺 -煤油作萃取剂对其进行萃取处理 ,在最佳工艺条件下 ,经过三级萃取 ,废水的 COD去除率达 95%以上 ,硝基物去除率达 98%以上 ,萃取剂用 N a

The wastewater form meta\|dinitrobenzene production containing ortho\|nitrobenzenesulfonic acid and para\|nitrobenzenesulfonic acid was treated by the way of extraction with trioctylamine\|kerosene, reaching 95% of COD removal rate and 98% of nitroaromatic compounds removal rate. The extractan could be reused after regeneration by treating with NaOH solution.\;